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Quantum test of the Universality of Free Fall using rubidium and potassium

Albers, Henning, Alexander Herbst, L. Richardson, Hendrik Heine, Dipankar Nath, Hartwig, Jonas, Christian Schubert, Vogt, Christian, Marian Woltmann, Cláus Lämmerzahl, Sven Herrmann, Wolfgang A. Ertmer, Ernst Maria Rasel, Dennis Schlippert

Published Jan 1, 2020• 38 citations
Publisher
DOI
10.15488/13853

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Abstract We report on an improved test of the Universality of Free Fall using a rubidium-potassium dual-species matter wave interferometer. We describe our apparatus and detail challenges and solutions relevant when operating a potassium interferometer, as well as systematic effects affecting our measurement. Our determination of the Eötvös ratio yields ηRb,K = −1.9 × 10−7 with a combined standard uncertainty of ση = 3.2 × 10−7. Graphical abstract

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